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34kurt
3 years ago
5

A hot iron ball is dropped into 200.0 g of cool water. The water temperature increases by 2.0 C and the temperature of the ball

decreases by 18.6 C. What is the mass of the ball? waters specific heat is 4184 (J/kg•C)
Physics
1 answer:
Bess [88]3 years ago
7 0
0.2 KG, just search the question and it's on yahoo answers 
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Which of the following hypotheses is both falsifiable and testable?
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B. If all plants are watered at least once a day then they will all grow at least 1 cm a day.

All plants grow at different rates.

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What is the speed of sound at the atmospheric temperature of 30°C?
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3 years ago
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A 5.0-μC charge is placed at the 0 cm mark of a meter stick and a -4.0 μC charge is placed at the 50 cm mark. At what point on a
Maksim231197 [3]

Answer:

The distance from charge 5 μ C = 26.45 cm and the distance from - 4 μ C is 23.55 cm.

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Given that

q₁ = 5 μ C

q₂ = - 4 μ C

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Lets take at distance x from the charge μ C ,the electrical field is zero.

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We know that ,electric field is given as

E=K\dfrac{q}{r^2}

K\dfrac{5\ \mu}{x^2}=K\dfrac{4\mu }{(50-x)^2}\\\\\dfrac{5}{x^2}=\dfrac{4 }{(50-x)^2}\\\\\\5(50-x)^2=4x^2\\(50-x)^2=0.8x^2\\\\50-x =0.89x\\\ x=\dfrac{50}{1.89}\ cm\\\\\\x=26.45\ cm\\

Therefore the distance from charge 5 μ C = 26.45 cm and the distance from - 4 μ C is 23.55 cm.

3 0
3 years ago
A girl playing tug-of-war with her dog pulls the dog a distance of 8.0m by exerting a force at an angle of 18° with the horizont
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Answer:

25 N

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